diff --git a/rtos/code/driver/na51089/source/mcu/sf_mcu.c b/rtos/code/driver/na51089/source/mcu/sf_mcu.c
index 3e027429a..4d6eae3ac 100755
--- a/rtos/code/driver/na51089/source/mcu/sf_mcu.c
+++ b/rtos/code/driver/na51089/source/mcu/sf_mcu.c
@@ -765,7 +765,7 @@ UINT32 sf_gpio_get_status(UINT32 ipin)
 }
 UINT32 sf_in_update(void)
 {
-    if(!sf_gpio_get_status(GPIO_KEY_TEST)){
+    if(sf_gpio_get_status(GPIO_KEY_TEST)){
        return 1;
     }
     return 0;